A document or image that was created after an event happened

Historians have recently discovered a historical journal published in the early twentieth century. the journal contains facts based on original sources about the downfall of the early byzantium empire. historians consider this long-lost journal to be a breakthrough in their understanding of the byzantium empire. based on this information, the journal is a source.

In what ways could globalization possibly impact negatively and/or positively your current or future work environment

Why did einstein write a letter to president roosevelt